Corneas from pigs’ eyes being used to restore vision in China

The cornea, which is the transparent layer in front of the eye, from pigs'
eyes may now help millions of blind patients to see again. Chinese eye
surgeons have made artificial corneas by bioengineering of pigs' eyes.
Forty-seven patients who received the transplant have fully recovered their
sight. This includes a 14-year-old boy who was injured by a firecracker.
Research on the use of animal corneas began in China in 2003. In the
beginning, tissues from chickens, cows, ducks, geese, monkeys and sheep were
used. Finally, pigs were selected because its tissue has the lowest risk of
infection for humans. However, the corneas cannot cure all eye disorders.

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